Loading, hauling, and dumping apparatus



March 9, 1943. L. w. BROOKS LOADING, HAULING, AND DUMPING APPARATUS File d April 10, 1940 4 Sheets-Sheet 1 INVENTOR.

ATTORNEYS;

Marc 9, 1943. w. BROOKS 2,313,514

LOADING, HAULING, AND DUMPING APPARATUS Filed April 10, 1940 4 Sheets -Sheet 2 Lewwallace Err uuks Marci-19,1943. L BROOKS 2,313,514

LOADING, HAULING, AND DUMPING APPARATUS Filed April 10, 1940 4 Sheets-Sheet 3 FIG. 12.

INVENTOR.

Lew Wallace Eirnnks.

AT'TORN EYS.

March 9,1943. ROO 2,313,514

LOADING, HAULING, AND DUMPING APPARATUS Filed April 10, 1940 .4 Sheets-Sheet 4 I INVENTOR.

Lw Wauaha Elrunks.

/ ATTORNEYS.

unloading without Patented Mar. 9, 1943 UNITED" STATES PATENT OFFICE LOADING. HAULING, AND DUIHPING APPARATUS Application April 10, 1940, Serial No. 3283955 12 Claims. (CL 214-77) The present invention relates to improvements in loading, hauling and dumping apparatus, and this application is a continuation in part of my co-pending application for patent for Loading, hauling, and dumping apparatus, flled May 19, 1938, Serial Number 208,935 now Patent No. 2,200,020, granted May 7, 1940.

A primary object of the present invention resides in the provision of improved material handling apparatus wherein a single vehicle provided with a hoist mechanism is adapted for economical loading, transporting, dumping, or dumping, loaded skips, buckets, or other apparatus loaded with miscellaneous materials,

A further object of this invention is the provision of improved hoist mechanism for handling skips, wherein maximum truck efliciency is provided thru proper load distribution and the skip when in carrying position on the truck is retained against shifting in any direction.

A further object is the provision of improved jack means for relieving the truck chassis from extreme overhung load when the skip or bucket is being raised from or lowered to the ground and which also eliminates the necessity for counterweight means upon the front portion of the truck.

A further object of the invention resides in the provision of an improved hoist mechanism for loading, hauling and dumping materials which is sturdy and quick acting and adapted for use in connection with an improved skip or bucket mechanism.

A further object resides in the provision of an improved loading, supporting, and dumping unit tion on the truck.

Figure 2 is a fragmentary view of the rear portion of the truck chassis and hoist structure with portions of the latter broken away, and showing the bucket in partially raised position with the jack leg in position relieving load strain on the truck chassis.

Figure 3 is a longitudinal section thru the loading, hauling and dumping unit with the bucket in a load dumping position.

Figure 4 is an enlarged rear elevation of the unit with the bucket in loaded or carrying position.

Figure 5 is a fragmentary top plan view of the unit showing the bucket in position ready to be picked up.

Figure 6 is a perspective view looking at the rear end of the bucket handling unit with the booms in raised position.

Figure 7 is an enlarged vertical section thru the support or jack leg assembly.

Figure 8 is a front elevation of the jack leg I assembly.

Figure 9 is a horizontalsection on line 9-9 of FigureB.

Figure 10 is a detail view of the control means letter A generally designates the improved loadstruction for use in connection with the improved hoist mechanism of this invention.

Other objects and advantages of theinvention will be apparent from the following detailed d6? scrlption, taken in connection with the accompanying drawings forming a part of this specification and in which drawings:

Figure 1 is a side elevation of the improved loading, hauling and dumping mechanism, show-.

ing the hoist structure on a truck chassis with the bucket in carrying position on the chassis,

and showing in dotted lines the bucket in filling ing, hauling and dumping apparatus consisting of a truck B, load or bucket handling unit C, and a bucketconstruction D.

The truck B may be of any preferred type and in the example shown includes the chassis l5 having front running gear l6 and rear running gear H, with an engine forward of the cab structure i8 above the front running gear. The usual drive is provided between the engine and the rear running gear, and a suitable power takeoff is associated with this drive for operating the mechanism 0.

Referring now to the load or bucket handling unit C, the same includes a sub-frame 20 upon which is mounted hydraulic hoist means 2| having detachable connection with the bucket D. The sub-frame 20 is mounted upon the truck chassis |5 rearwardly of the cab II with the rear end of the sub-frame substantially aligning with the rear end of the chassis. As shown particularly in Figure 4, the sub-frame is appreciably wider than the rear portion of the chassis frame of the truck.

The sub-frame is preferably of welded construction and includes a pair of longitudinal support or bed rails 22 provided with suitable front cross bracing 23 extending laterally beyond the forward ends of the rails 22, and rear cross bracing 24' which extends laterally beyond the rear ends of the bed rails 22. The parallel bed rails 22 may be of channel-shape and spaced so as to rest upon the side rails of the truck chassis. Front and rear attaching plates 25 and 25 respectively, may be employed for securing the subframe 2|! to the truck chassis. Supported upon and secured to the bed rails 22 is a horizontal deck plate or load supporting platform 21 having its side margins or edges disposed laterally of the bed rails but spaced inward of the ends of the cross bracings 23 and 24. The forward edge of the deck plate may be secured as by welding or the like to the upper side of the front cross bracing 23. The rear end of the deck plate 21 has a sloping or inclined tilting portion 28 which extends downwardly over the rear cross bracing member 24 and is reinforced along its lower edge by an angle iron brace member 29.

Secured as by welding or any preferred manner to each side edge of the deck plate 21 is an inner side plate 30 which extends above the deck plate thruout its length, with the forward ends of the plates extending forwardly of the front edge of the deck plate. The rear end portions of these inner side plates 30 extend below the deck plate for attachment to the rear cross brace member 24 beyond the ends of the tilting portion 28. Disposed in parallel spaced relation outwardly of each inner side plate 30, is an outer side plate 3|. These outer side plates 3| also extend forwardly of the front edge of the deck plate 21 and may be secured as by welding, to the outer ends of the front cross bracing 23. The rear end portions of these outer side plates 3| extend below the deck plate and are connected to their respective iner side plates by a spacer plate: 32 which may be either bolted or welded to the ends of the rear cross brace 24. Thus, these parallel spaced apart side plates 30 and 3| form upwardly and rearwardly opening channelways extending longitudinally of the sub-frame at each side of the deck plate 21.

Referring now to the hydraulic hoist means 2|, the same includes a pair of hoist units 33 arranged one in each of the channelways formed by the companion side plates 33 and 3|. These hoist units 33 are of like construction and each includes a double acting hydraulic cylinder 34 which is pivoted at its forward end upon a horizontal pivot pin 35 mounted in the forward ends of the side plates 33 and 3|. A piston 35 is arranged in the cylinder 34 and has connected thereto a piston rod 31 which extends from the rear end of the cylinder. Mounted at its lower end between the lower rear portions of the side plates 3|! and 3|, as upon a horizontal load shaft 38, is a boom having pivotal connection above the shaft 33 with the rear end of the piston rod is suitably iournaled in the sub-frame 2|) to extend transversely of the sub-frame beneath the rear end of the deck plate 21 and at a point slightly to the rear of the rear running gear l1. When the hoist units 33 are lowered, the free ends of the booms 43 extend rearward beyond the rear end of the truck chassis. Connecting the free ends of the booms 43 is a cross shaft or bar 42, which is preferably rigid with the booms so that the booms swing as a unit. As shown, the booms 40 have rearwardly offset portions adjacent their lower ends in which the piston rods 31 are pivoted by the pins 4|.

Suitably mounted beneath the forward portion of the deck. plate 21, between the bed rails 22, is a hydraulic motor including a pump 43 and a control valve 44. An oil reservoir 45 may be suitably associated with the hydraulic motor. Connecting the forward portion of each cylinder 34 with the control valve 44 is a fluid pressure line 46, while connecting the rear portion of each cylinder 34 with the control valve is a fluid pressure line 41; and these pressure lines are each provided with a' section of hydraulic hose to permit vertical swinging of the cylinders during raising and lowering of the booms 40. A drive shaft 43 serves to operate the pump 43 from a suitable power take-off 49 driven from the truck engine and controlled by the control lever 50 disposed in the truck cab l3. The control valve 44 for controlling fluid delivery to the cylinders 34, is controlled by a valve control lever 5| which is also arranged in the truck cab l8 adjacent the driver's seat and has connection with the control valve by suitable linkage 52. The control valve 44 is of the type having several operative positions, such as controlling fluid circulation for 31 as by a pin 4|. This horizontal load shaft 33 hoisting or lowering the booms, or for arresting circulation to hold the booms in any desired position. As will be readily seen, when fluid is delivered into the rear of the cylinders 34 thru the pressure lines 41, the booms 40 will be elevated to hauling position, and when fluid is delivered,

into the forward end of the cylinders thru the pressure lines 46, the booms will be lowered.

Freely rotatable upon each end of the cross shaft 42 just inward of each boom 40 is a chain saddle 53 held against shifting inwardly along the cross shaft by collars 54. These chain saddles 53 are each provided with a pair of eye bolts 55 to which are attached one end of saddle chains 56. The lower or free ends of the pairs of saddle chains 56 are each provided with a key plate 51 for detachable connection with the bucket construction D.

Referring now to the bucket construction D, the same is made of heavy steel plate sections which are welded together and suitably reinforced to provide a substantially one-piece structure having a width slightly less than the spacing between the inner side walls 33 of the sub-frame and of not too great height to permit easy loading of the bucket. The bucket is substantially square in top plan and is formed with a flat bottom wall 58 having a long sloping or inclined rear wall 59 extending upwardly at an angle of about 45 from the rear edge of the bottom wall. The front wall of thebucket is formed with angularly related inclined wall portions 60 and 5| which are so disposed that the front wall extends in a more general vertical direction than rear wall 59, while a reinforcing angle 64 is placed at the inner side along the upper edge of the front wall portion 8|. As shown more clearly in Figure 5, the area of the flat bottom wall 58 is rather small in comparison with the top area of the bucket. The specific formation of the front and rear walls of the bucket will place the major weight of the load to the front-of the bucket. Welded to the upper portion of each side wall 82 are two spaced apart lugs 85 which are adapted to detachably receive the key plates 57 whereby the bucket may be suspended by the saddle chains 56 for handling the bucket.

Provided along the outer side at the lower end of the inclined rear wall 58 are reinforcing angle irons 86 which are spaced apart at their adjacent inner ends and support a dumping bar or rod 81 in spaced relation to the bucket wall 58 midway between the side walls 88. This dumping bar 51 is adapted to cooperate with trip means on the sub-frame for tilting the bucket into a load dumping position.

Referring now to the means for relieving load strain on the truck chassis during loading of the bucket, and eliminating the necessity of counterweight means upon the front portion of the truck, this means includes a jack leg structure 18 mounted beneath the rear cross bracing of the sub-frame rearward of the rear running gear of the truck and controlled from the truck cab l8. This jack leg structure 18 comprises a pair of brackets 'll secured to and depending from the rear cross bracing 28-29. A housing 72 is pivoted at its upper end by trunnions '13 to the lower ends of the brackets H whereby the housing may swing in a direction forwardly and rearwardly of the truck. Slidably movable in the housing 12 is a support bar 18 which is provided at its lower end with a base or foot 15 having a rounded bottom surface arcuated in a direction in which the housing 12 rocks. Arranged in the forward side of the housing 72 is a ratchet bar 16 with which a pawl H- pivoted in the upper portion of the support bar 14 co-acts for retaining the support bar extended. A coil spring 18 normally urges the pawl 11 into engagement with the ratchet bar 16.

Connected at one' end to the pawl 11 is a control cable 88 for elevating the'support bar M, and this cable extends upward between the brackets H and is trained over a sheave M from which it extends forwardly beneath the subframe 28 to a location beneath the floor of the truck cab 18. Mounted vertically within the truck cab l8 as by means of suitable brackets 82, is a fixed tubular housing 83 in which is disposed a rotatable shaft 84 having a crank handle 85 fixed upon its upper end. The lower end of the shaft 84 extends below the housing and is bent at a. right angle providing a crank arm 86 to which the forward end of the cable 88 is attached. An L-shaped stop 81 welded to the fixed housing 83 and extending forwardly of the housing serves to limit swinging movement of the crank arm 85 beyond a given position when the arm is swung to raise the support bar M.

Referring now to the trip means for dumping the bucket, this means includes a trip hook 98 mounted to turn freely on the load shaft 38 at a location midway of the ends of the shaft. This trip hook 98 projects upwardly thru a slot or opening at provided in the upper portionof the inclined tilting portion 28 at the rear of the deck plate 21 and is adapted to be engaged by the dumping bar 51 to tilt the bucket to a dumping position. A cable 82 is attachedat one end of the trip hook 88 and has its opposite or forward.

end connected to the Jack operating cable 88 at a point forwardly of the load shaft 38. A coil spring 83 is interposed in the cable 92 which allows the bucket in dumping to turn the trip hook 98 about the load shaft 38 without placing a strain on the cables 88 or 92. The trip hook 88 is limited in its 'forward swinging movement thru engagement with the deck plate at the forward edge of the opening 8!; and is normally free to swing rearward and downward when engaged by the dumping bar 61. When so engaged, the corner edge of the angle irons 66 on the bucket engages the inclined deck portion 28 and forms a fulcrum point during dumping.

In operation of the apparatus, a plurality of the buckets D may be employed and may be loaded at convenient points with material to be transported. With the loaded bucket resting on the ground, as shown by dotted lines in Figure 1, the truck is backed up and the booms 48 lowered so that the key plates 57 on the chain 58 may be engaged over the headed lugs 65 on opposite side walls of the bucket. The truck driver then rotates the jack control shaft 84 by means of the crank handle 85 and swings the crank arm 86 to a rearward position which slackens the cable 88 and allows the support bar 14 of the jack F8 to lower by its own weight within the housing 12 until the foot or base 15 engages the ground surface, as shown in Figure 2. When the cable 88 is thus slackened, the spring 18 engages the pawl 11 with the ratchet 16 and the jack leg forms a column supporting the rear end of the truck and acts as a fulcrum about which the load can be raised or lowered. This controlled supporting column behind the rear running gear of the truck tends to retain the front end of the truck from raising up from the ground and also decreases the load strain on the rear truck springs. The operator now sets the pump 43 in operation and actuates the control valve 44 by means of the control lever 5| for raising the booms 48 whereby the bucket will be raised to a loaded or carrying position resting directly upon the deck plate 21, as shown in Figure 1. When the loaded bucket is in a carrying position on the sub-frame 28, the dumping bar 61 on the housing 12 pivots in the brackets H and the baseof the jack bar 14 rolls on its rounded lower surface, thus relieving any supporting action by the jack leg. With the load thus removed from the jack leg, the crank arm 88 of the jack control shaft 84 is swung to a forward position and exerts a pull on the cable 88 which draws the pawl 11 out of engagement with the ratchet 16 and raises the jack bar 14 within the housing 12. The stop 81 as shown in Figures 10 and 11, acts to hold the control shaft 84 from turning completely thru 360due to the tension of the cable 88 when the jack bar 14 is in a raised position.

When desiring to lower a loaded bucket from the truck without dumping, the jack leg is lowered to form a support for the rear end of the truck in the same manner as it is employed when raising a loaded bucket to carrying position on the truck. As will be noted. a single control means operates both the Jack leg and the trip hook simultaneously, and when tension is relieved on the cable 80 to permit the Jack bar 14 to lower, the trip hook 90 may swing rearward and downwardly by gravity to an inoperative position with respect to the dumping bar of the bucket.

Referring now to the manner of dumping a loaded bucket from a carrying position on the truck, it is unnecessary to lower the Jack leg when dumping a bucket owing to the fact that the dumping position of the bucket is but a short distance rearward of the rear running gear of the truck. When the jack leg is raised, the trip hook 90 is in an operative position, as shown in dotted lines in Figure 3, so as to be readily engaged by the dumping bar 61. As the booms swing rearward, the dumping bar 61 engages the trip hook 90 which causes the bucket to be tipped into the full line showing position in Figure 3, so that the contents of the bucket are discharged. The hoist means may then be operated for returning the bucket to a carrying position on the truck and the dumping bar will automatically disengage from the trip hook.

The single control arrangement for both the jack leg and the trip hook are such as to insure against the operator setting down a loaded bucket without employing the jack leg to relieve load strain on the rear of the truck, but allows for the bucket being dumped without lowering the jack leg. As will be seen, when the jack leg is raised, the trip hook is in position to be engaged by the dumping bar, and when the jack leg is lowered, the trip hook will be out of position to be engaged by the dumping bar.

As shown particularly in Figure 6, the deck plate 21 provides a clear flat platform which is available for hauling miscellaneous materials when buckets are not being used.

Changes in detail may be made to the form of the invention herein shown and described, without departing from the spirit of the invention or the scope of the following claims.

I claim:

1. In apparatus for the loading, hauling, and dumping of materials, the combination of a truck, a bucket, hoist means on the truck for elevating and lowering the bucket, means for connection between the hoist means and the bucket for elevating the bucket to a supported position resting directly on the truck, and a dumping bar on the bottom of the bucket co-acting with a pivoted trip hook at the rear of the truck for automatically causing tilting of the bucket as the hoist means operates to lower the bucket from its supported position on the truck at a location where the materials are to be dumped.

2. In apparatus for loading, hauling, and dumping materials, a truck having a chassis including rear wheels, a bucket, a bucket handling unit on the chassis including a sub-frame extending rearward of the rear wheels, a hoist frame pivoted on the rear end of the sub-frame at the rear end of the chassis, hoist means pivoted on th front end of the sub-frame for elevating and lowering the hoist frame, and chain connections between the free end of the hoist frame and bucket for elevating the bucket by raising it upwardly at the rear end of the sub-frame and then forwardly and lowering it to a supported position resting directly on the sub-frame with the weight of the bucket substantially balanced forwardly and rearwardly of said rear wheels.

3. In bucket loading. hauling, and dumping apparatus, a bucket, and a handling unit for the bucket comprising a sub-frame, a boom pivoted upon the rear end of the frame, hydraulic hoist means for raising and lowering the boom, saddle chains on the boom for releasable connection with the bucket, a horizontal bucket supporting platform on the frame, a trip hook at the rear end of the platform, and means on the bucket engageable with the trip hook for tilting the bucket to a dumping position.

4. In a bucket, and bucket handling unit, a bucket having a dumping bar adjacent the bottom of its rear wall, a supporting platform for the bucket, a swinging trip hook normally projecting upwardly thru an opening at the rear end of the platform and engageable by the dumping bar for causing tilting of the bucket to a dumping position, and means for releasing the trip hook and permitting the trip hook to sw n to a position out of engagement by, the dumping bar to permit handling of the bucket without dumping.

5. In a loading, hauling, and dumping unit for trucks, a sub-frame for mounting upon the chassis of the truck, a flat deck plate extending beyond the sides of the sub-frame, a load shaft ioumaled transversely beneath the rear end of the sub-frame, a hoist unit at each side of the deck plate each including a boom mounted on the load shaft and pivoted therewith, and a load supporting cross shaft connecting the free ends of the booms, and load engaging means carried by each end of the cross shaft.

6. In apparatus for loading, hauling, and dumping materials, a truck having a chassis, a sub-frame on the chassis including a deck plate, a hoist unit at each side of the deck plate each including a boom, a cross shaft connecting the free ends of the booms, a bucket having a dumping bar, connections between the bucket and cross shaft whereby the bucket is elevated by the hoist units to a carrying position on the deck plate, a trip hook pivoted at the rear of the deck plate and engageable with the dumping bar for tilting the bucket to a dumping position, and control means for the hook permitting lowering of the bucket without dumping,

7. In apparatus for loading, hauling and dumping materials, a truck having a chassis, a subframe on the chassis including a deck plate, a hoist unit at each side of the deck plate each including a boom pivoted to swing rearward of the rear end of the truck chassis, a cross shaft connecting the free ends of the booms, a bucket, means connecting the bucket to the cross shaft, trip means for dumping the bucket, a jack leg at the rear end of the truck chassis, and a single control means for thetrip means and jack leg and retaining the trip means in position to dump the bucket until the control means is operated to render the jack leg active to support the rear end of the chassis.

8. In loading, hauling, and dumping apparatus, a truck having a chassis, load handling means including a boom structure pivoted at the rear end of the chassis, an extensible jack leg pivoted at the rear end of the chassis to swing longitudinally of the chassis, and control means normally holding the lack leg contracted and operable to allow extension of the jack to a position engaging the ground for relieving load strain on the chassis during load lifting and lowering movement of the boom structure.

- 9. In a load handling unit for trucks. 0. subframe having a horizontal deck plate, a boom pivoted to swing rearward of the frame at each side of the deck plate, hoist means for the booms, a cross bar connecting the free ends of the booms, a bucket having headed lugs on each side wall thereof, a saddle rotatable on each end of the cross bar, and a pair of support chains suspended from each saddle and each having a key plate at its end for engaging over said lugs.

10. In loading, hauling, and dumping appara-i tus, a truck, a bucket having a dumping bar, a handling unit on the truck having a deck plate plane of said platform during a portion of the rearward swinging movement of thebucket, and control means for positioning said trip hook in either said first or second positions, including a spring yieldable to permit movement of said trip hook from aid first position to said second the dumping bar and during a portion of the rearward swinging movement of the. bucket.

forming a support for the bucket, hoist means for the bucket, a pivoted trip hook for dumping the bucket, a jack leg at the rear end of the truck, a control cable for the jack leg, a trip hook cable connected between the control cable and trip hook and having a spring connected therein, and a control crank for'the' control cable.

'11. Apparatus for lifting, transporting, dumping and lowering materials comprising a truck, a. bucket provided with a dumping bar at its lower portion, and a bucket handling unit on the truck including a horizontal bucket supporting platform, hoist means for swinging the bucket from a position resting upon said platform to a position rearwardly of the truck and .vice versa, a pivoted trip hook movable to a first position extending above the plane of said platform and into 12. Apparatus for lifting, transporting, dumping and lowering materials comprising a truck, a bucket provided with a dumping bar at its' lower portion, and a bucket handling unit on the truck including a horizontal bucket supporting platform, hoist means for swinging the bucket from a position resting upon said platform to a position rearwardly of the truck and vice versa, a

pivoted trip hook movable to a first position extending above the plane of said platform and into the path in which said dumping bar moves for engagement therewith as the bucket swings rearwardly responsive to said hoist means to bodily swing the bucket to a dumping position and said trip hook movable to a second position out of the path of said dumping bar, and control means for positioning said trip hook in either said first or second positions and including a spring yieldable to permit movement of said trip hook from said first position to said second position when the trip hook is in engagement with the dumping bar and during a portion of the rearward swinging movement of the bucket.

LEW WALLACE BROOKS. 

